﻿       * {
            margin: 0;
            padding: 0;
            font-family:"微软雅黑";
               
        }

        body, html {
            width: 100vw;
            height: 100vh;
        }

        table {
            margin:0 auto;
              width:90vw;
            height: 50vh;
            /*align-content: center;*/
        }
        table tr td{
         font-size:3em;
        }
        table tr{
            height:10vh;
        }
        .but {
            width: 50vw;
            height:10vh;
            font-size:1.5em;
        }
        #xm{
            width:50vw;
            height:10vh;
            font-size:1.5em;
        }
        .radi{
            width:3em;
            height:3em;
            margin-left:1.5vw;
        }